Lawn-mower.



N0.89e,ssv. v PATENTED AUG.18, 1908`. J. A. svsmNsoN. 1

LAWN MOWER.

APPLIOATION FILED MAB.. 25,1907.

y JZ ,is Ivm. wwfggs JOHN A. SWENSON, OF BROOKLYN, NEW YORK.

LAWN -MOWER.

To all whom it may concern: y

Be it known that I, JOHN A. SwENsoN, a citizen of the United States of America, and residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Im rovements in Lawn- Mowers, of which the fo lowing is a specification, such as will enable those skilled in the art to which it Aappertains to make and use the same.

This invention relates to lawn mowers and is an improvement over that shown and described in my United States Patent No. 847,213, issued to me on the twelfth of March, 1907, and the obj ect thereof is to provide a device of this character by means of which grass and the like closely adjacent to fences, posts and other practically inaccessible places may be cut: a further object being to provide such a device which may be readily started from any position of its parts, thereby overcoming what is known as dead center, and which may be continuously operated when started and a still further object being to provide means for preventing dead center7 in any crank operated rotary device.

My invention is fully described in the following specification, of which the accompanying drawings form a part, in which the separate parts are designated by similar reference characters in each of the views, and in whichz Figure l is a plan view of a lawn mower constructed according to my invention and showing one position of its parts; Fig. 2 is a similar view but showing another position of its parts g Fig. 8 is a central longitudinal section thereof, and Fig. 4 is a section thereof taken on the line 4-4 of Fig. 2.

In the drawings forming a part of this application, I have shown a disk a provided with a cam groove a2 and rotatably mounted upon a bar b at one end thereof and the bar b has a transversely arranged plate c at the other end thereof which is provided with cutting teeth c2 and the bar b is also provided with a roller b2 at a point adjacent to the outer end thereof.

Secured above the bar b is a plate d to which are secured two transversely arranged guides d2 for two operating arms e and e2 which are pivotally mounted at e3 upon the plate d and pivotally mountedat the inner end of the arm e2 is a crank lever f provided with a handle f 2 and the arme is also provided Y Specification of Letters Patent.

Application led March 25, 1907.

Patented Aug. is, 190s.

seria No. 364,331.

with a handle f 3. Iivotally mounted upon a pin h firmly fixed in the disk a is a link h2 also ivoted to the arm e and a crank arm h3 is rmly secured against movement to the said pin h, said crank arm being connected with a supplemental link h4 in turn pivoted to the arm e2 and forming a toggle ever which is connected with the crank leverf by means of a link h5 and, if desired, the connection between the links h4 and h5 may be made sliding as shown in the drawings. Pivotally mounted beneath the plate d is a lever t' which carries a plate i2, (provided with cutting teeth 713, at its outer en the connection therebetween being apivotal one and the plate i2 is slidably secured to the late c in such manner as to permit the cutting teeth c2 and i3 to slide over each other. Mounted upon the inner end of the lever i is a stud 7c which rests in the cam groove a2 and I preferably secure a yoke shaped plate k2 to the lever i and passed over the disk a to insure permanent engagement of the stud and cam groove.

When the parts are in the position shown in Fig. l, if the handles f2 and f3 are moved outwardly, the arm e, by means of the link h2 rotates the disk a, this operation being assisted by the arm e2, crank ha and link h4, and crank lever f and link h5, and when the disk is so rotated, the lever 'i is oscillated upon its pivot and the teeth t3 are moved over the teeth c2 and cutting results.

It will be seen that, if the link h2, crank h3 and link h4 are in line with each other, a dead center of the arms e and e2 is produced which, without this invention, would require manual manipulation to overcome, but, because of the crank lever f, movement of the handle f2 exerts force upon the crank arm 71,3 through the'link h5 and thus rotates the disk beyond the dead center after which the arm e becomes operative through an arc of 180 degrees to the opposite dead center of the said arms, these dead centers being transversely of the device whereas the possible dead centers of the lever f are approXimately longitudinally of the device thus making either the said arms or the said lever, or both, operative at any point of the rotation of the said disk.

If desired, a plurality of attaching points may be provided for the links and levers in order to produce the desired result at greater or less degrees of power in accordance with the material being cut and the speed of the operation and various other changes in andv modiiicatiOns of the form of construction shown may be made and the dead center preventer may also be changed to adapt it to other uses than that described and, with this reservation,

A What claim as new and desire to secure by Letters Patent, is

1. In a lawn mower, the combinationof a rotary device, a support therefor, a cutterin operative connection with said device, an

arm in operative connection with said device,

a supplemental arm in operative connection -with said device and means connected with said supplemental arm for exerting power to said rotary device in a direction different from .that exerted by said arms.

2. In a lawn mower, the combination of a i frame,` a lever mounted thereon, a cutter on said lever, a disk provided with a cam groove for oscillating said lever, ,means for rotating ysaid disk and devices for moving said rotating means from a dead center.

3. In a lawn mower, the combination of a frame, a lever thereon, a rotatable element for oscillating said lever, a cutter on said lever, arms and connections for rotating said rotatable element and means connected with one of said arms for overcoming a dead center'of said rotatable elementi 4, A lawn mower,pcomprising a frame, a lever thereon,u a cutter on said lever, a rotatable element for oscillating said lever, pivoted arms lon said frame, links connecting said arms with said rotatable element, a

crank lever on one of said arms and a supplesaid crankwith the other arm, a crank lever on said last named arm and a link connecting said crank lever and said last namedlink.

In testimony that I claimthe foregoing as my invention I have signedmy name in presence of' the subscribing witnesses this 22nd day of March 1907.

JOHN A. SWENSON.

Witnesses:

B. L. SACHS, H. NOTTLAN 

